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><DIV
CLASS="sect1"
><H1
CLASS="sect1"
><A
NAME="fuzzy"
>8.8. Fuzzy search</A
></H1
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="ispell"
>8.8.1. Ispell</A
></H2
><A
NAME="AEN5239"
></A
><P
>When <SPAN
CLASS="application"
>DataparkSearch</SPAN
> is used with ispell support enabled, it automatically
extend search query by all grammatical forms of the query words. E.g. search front-end will try to
find the word "test" if "testing" or "tests" is given in search
query.</P
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="typesispellfiles"
>8.8.1.1. Two types of ispell files</A
></H3
><P
><SPAN
CLASS="application"
>DataparkSearch</SPAN
> understands two types of ispell
files: affixes and dictionaries. Ispell affixes file contains rules
for words and has approximately the following format:
<PRE
CLASS="programlisting"
>&#13;Flag V:
       E   &#62; -E, IVE      # As in create&#62; creative
      [^E] &#62; IVE          # As in prevent &#62; preventive
Flag *N:
       E   &#62; -E, ION      # As in create &#62; creation
       Y   &#62; -Y, ICATION  # As in multiply &#62; multiplication
     [^EY] &#62; EN           # As in fall &#62; fallen
</PRE
>
</P
><P
>Ispell dictionary file contains words themselves and has the following format:
<PRE
CLASS="programlisting"
>&#13;wop/S
word/DGJMS
wordage/S
wordbook
wordily
wordless/P
</PRE
>
</P
></DIV
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="using-ispell"
>8.8.1.2. Using Ispell</A
></H3
><A
NAME="AEN5252"
></A
><A
NAME="AEN5255"
></A
><P
>To make <SPAN
CLASS="application"
>DataparkSearch</SPAN
> support ispell you must
specify <B
CLASS="command"
>Affix</B
> and <B
CLASS="command"
>Spell</B
> commands in <TT
CLASS="filename"
>search.htm</TT
>
file. The format of commands:
		<PRE
CLASS="programlisting"
>&#13;Affix [lang] [charset] [ispell affixes file name]
Spell [lang] [charset] [ispell dictionary filename]
</PRE
>
</P
><P
>The first parameter of both commands is two
letters language abbreviation. The second is ispell files charset.
The third one is filename. File names are relative to <SPAN
CLASS="application"
>DataparkSearch</SPAN
>
<TT
CLASS="literal"
>/etc</TT
> directory. Absolute paths can be also
specified.</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>Simultaneous loading of several languages is supported, e.g.:
			<PRE
CLASS="programlisting"
>&#13;Affix en iso-8859-1 en.aff
Spell en iso-8859-1 en.dict
Affix de iso-8859-1 de.aff
Spell de iso-8859-1 de.dict
</PRE
>
</P
><P
>Will load support for both English and German languages.</P
></BLOCKQUOTE
></DIV
><P
>If you use <TT
CLASS="literal"
>searchd</TT
>, add the same commands to <TT
CLASS="filename"
>searchd.conf</TT
>.</P
><P
>When <SPAN
CLASS="application"
>DataparkSearch</SPAN
> is used with ispell support it
is recommended to use <TT
CLASS="literal"
>searchd</TT
>, especially for
several languages support. Otherwise the starting time of
<TT
CLASS="filename"
>search.cgi</TT
> increases.</P
></DIV
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="addwords-dict"
>8.8.1.3. Customizing dictionary</A
></H3
><P
>It is possible that several rare words are found
in your site which are not in ispell dictionaries. In such case, an entry with longest match suffix is taking
	  to produce word forms.</P
><P
>But you can also create the
list of such words in plain text file with the following format (one
word per line):
		<PRE
CLASS="programlisting"
>&#13;rare.dict:
----------
webmaster
intranet
.......
www
http
---------
			</PRE
>
</P
><P
>You may also use ispell flags in this file (for
ispell flags refer to ISpell documentation). This will allow not
writing the same word with different endings to the rare words file,
for example "webmaster" and "webmasters". You may choose the word
which has the same changing rules from existing ispell dictionary and
just to copy flags from it. For example, English dictionary has this
line:</P
><P
>&#13;			<TT
CLASS="literal"
>postmaster/MS</TT
>
		</P
><P
>So, webmaster with MS flags will be probably OK:</P
><P
>&#13;			<TT
CLASS="literal"
>webmaster/MS</TT
>
		</P
><P
>Then copy this file to <TT
CLASS="filename"
>/etc</TT
> directory of
<SPAN
CLASS="application"
>DataparkSearch</SPAN
> and add this file by <B
CLASS="command"
>Spell</B
> command in 
<SPAN
CLASS="application"
>DataparkSearch</SPAN
> configuration:</P
><P
>During next reindexing using of all documents
new words will be considered as words with correct spelling. The only
really incorrect words will remain.</P
></DIV
><DIV
CLASS="sect3"
><H3
CLASS="sect3"
><A
NAME="where-to-get-ispell"
>8.8.1.4. Where to get Ispell files</A
></H3
><P
>You may find ispell files for many of languages at
<A
HREF="http://fmg-www.cs.ucla.edu/geoff/ispell-dictionaries.html"
TARGET="_top"
>this page</A
>.
</P
><P
>For Japanese language there exist quasi-ispell files suitable for use with <SPAN
CLASS="application"
>DataparkSearch</SPAN
> only.
You may get this data from <A
HREF="http://www.dataparksearch.org/"
TARGET="_top"
>our web site</A
> or from one of our mirrors.
See <A
HREF="dpsearch-get.en.html"
>Section 1.2</A
>.
</P
></DIV
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="aspell"
>8.8.2. Aspell</A
></H2
><A
NAME="AEN5305"
></A
><P
>With <SPAN
CLASS="application"
>Aspell</SPAN
> support compiled, it's possible automatically extend search query by spelling
suggestions for query words. To enable this feature, you need to install <A
HREF="http://aspell.net/"
TARGET="_top"
>Aspell</A
> at your system
before <SPAN
CLASS="application"
>DataparkSearch</SPAN
> build. Then you need to place
<A
NAME="AEN5311"
></A
>
<TT
CLASS="userinput"
><B
>&#13;AspellExtensions yes
</B
></TT
>
command into your <TT
CLASS="filename"
>indexer.conf</TT
> and <TT
CLASS="filename"
>search.htm</TT
> (or into <TT
CLASS="filename"
>searchd.conf</TT
>, if
<B
CLASS="command"
>searchd</B
> is used) files to activate this feature.
</P
><P
>Automatically spelling suggestion for search query words is going only if <TT
CLASS="option"
>sp</TT
> search parameter is set, see
<A
HREF="dpsearch-doingsearch.en.html#search_params"
>Section 8.1.2</A
>.
</P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="synonyms"
>8.8.3. Synonyms</A
></H2
><A
NAME="AEN5324"
></A
><P
><SPAN
CLASS="application"
>DataparkSearch</SPAN
> also support a synonyms-based
fuzzy search.</P
><P
>Synonyms files are installed into
<TT
CLASS="filename"
>etc/synonym</TT
> subdirectory of <SPAN
CLASS="application"
>DataparkSearch</SPAN
>
installation. Large synonyms files you need to download separately from our web site, or from one of our mirrors,
see <A
HREF="dpsearch-get.en.html"
>Section 1.2</A
>.</P
><P
><A
NAME="AEN5333"
></A
>
To enable synonyms, add to
<TT
CLASS="filename"
>search.htm</TT
> search template commands like
<TT
CLASS="literal"
>Synonym &#60;filename&#62;</TT
>, e.g.:
	<PRE
CLASS="programlisting"
>&#13;Synonym synonym/english.syn
Synonym synonym/russian.syn
</PRE
>
</P
><P
>Filenames are relative to <TT
CLASS="filename"
>etc</TT
>
directory of <SPAN
CLASS="application"
>DataparkSearch</SPAN
> installation or absolute if begin with
/</P
><P
>If you use <TT
CLASS="literal"
>searchd</TT
>, add the same
commands to <TT
CLASS="filename"
>searchd.conf</TT
>.</P
><P
>You may create your own synonyms lists. As an example you may take the
English synonyms file. In the beginning of the list please specify the
following two commands:
	<PRE
CLASS="programlisting"
>&#13;Language: en
Charset:  us-ascii
</PRE
>
</P
><P
></P
><UL
><LI
><P
>&#13;				<TT
CLASS="varname"
>Language</TT
> - standard
(ISO 639) two-letter language abbreviation.</P
></LI
><LI
><P
>&#13;				<TT
CLASS="varname"
>Charset</TT
> - any
charset supported by <SPAN
CLASS="application"
>DataparkSearch</SPAN
> (see <A
HREF="dpsearch-international.en.html#charset"
>Section 7.1</A
>).</P
></LI
></UL
><P
>Optionaly you may specify following command in the list:
	<PRE
CLASS="programlisting"
>&#13;Thesaurus: yes
</PRE
>
</P
><P
>This command enable thesaurus mode for synonyms list. For this mode, only words at one line treats as synonyms.
</P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="accent"
>8.8.4. Accent insensitive search</A
></H2
><A
NAME="AEN5361"
></A
><A
NAME="AEN5363"
></A
><P
>Since version 4.17 <SPAN
CLASS="application"
>DataparkSearch</SPAN
> also support an
accent insensitive search.</P
><P
>To enable this extension, use <B
CLASS="command"
>AccentExtensions</B
> command in your 
<TT
CLASS="filename"
>search.htm</TT
> (or in <TT
CLASS="filename"
>searchd.conf</TT
>, if <B
CLASS="command"
>searchd</B
>
is used) to make automatically accent-free copies for query words, and in your <TT
CLASS="filename"
>indexer.conf</TT
>
config file to produce accent-free word's copies to store in database.
<PRE
CLASS="programlisting"
>&#13;AccentExtensions yes
</PRE
>
</P
><P
>If <B
CLASS="command"
>AccentExtensions</B
> command is placed before <B
CLASS="command"
>Spell</B
> and <B
CLASS="command"
>Affix</B
> commands,
accent-free copies for those data also will be loaded automaticaly.
</P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="acronym"
>8.8.5. Acronyms and abbreviations</A
></H2
><A
NAME="AEN5381"
></A
><P
>Since version 4.30 <SPAN
CLASS="application"
>DataparkSearch</SPAN
> also support an
acronyms and abbreviation based fuzzy search.</P
><P
>Acronyms files are installed into
<TT
CLASS="filename"
>etc/acronym</TT
> subdirectory of <SPAN
CLASS="application"
>DataparkSearch</SPAN
>
installation.</P
><P
><A
NAME="AEN5389"
></A
>
To enable acronyms, add to
<TT
CLASS="filename"
>search.htm</TT
> search template commands like
<TT
CLASS="literal"
>Acronym &#60;filename&#62;</TT
>, e.g.:
	<PRE
CLASS="programlisting"
>&#13;Acronym acronym/en.fido.acr
Acronym acronym/en.acr
</PRE
>
</P
><P
>Filenames are relative to <TT
CLASS="filename"
>etc</TT
>
directory of <SPAN
CLASS="application"
>DataparkSearch</SPAN
> installation or absolute if begin with
/</P
><P
>If you use <TT
CLASS="literal"
>searchd</TT
>, add the same
commands to <TT
CLASS="filename"
>searchd.conf</TT
>.</P
><P
>You may create your own acronyms lists. 
As an example you may take the
English acronyms file. In the beginning of the list please specify the
following two commands:
	<PRE
CLASS="programlisting"
>&#13;Language: en
Charset:  us-ascii
</PRE
>
</P
><P
></P
><UL
><LI
><P
>&#13;				<TT
CLASS="varname"
>Language</TT
> - standard
(ISO 639) two-letter language abbreviation.</P
></LI
><LI
><P
>&#13;				<TT
CLASS="varname"
>Charset</TT
> - any
charset supported by <SPAN
CLASS="application"
>DataparkSearch</SPAN
> (see <A
HREF="dpsearch-international.en.html#charset"
>Section 7.1</A
>).</P
></LI
></UL
><P
>&#13;Please send your own acronym files to <TT
CLASS="email"
>&#60;<A
HREF="mailto:maxime@maxime.net.ru"
>maxime@maxime.net.ru</A
>&#62;</TT
>, if you want share its with other users.
</P
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